Mold high speed milling processing technology The abstract Introduced the high speed milling in the mold processing
application as well as the influence, and brief introduction high speed milling engine
bed structure, control system and cutting tool. Has carried on the simple analysis to
the high speed processing craft. Key word high speed milling; mold processing
First, foreword In the modern mold production, along with to models artistic and the function
must obtain more and more high, models the internal structure to design more and
more complex, the mold contour design day by day is also complex, the free curved
surface accounts for the proportion to increase unceasingly, the corresponding mold
structure also designs more and more complex. These all set a higher request to the
mold processing technology, not only should guarantee the high manufacture
precision and the surface quality, moreover must pursue the processing surface artistic.
Along with is unceasingly thorough to the high speed processing engineering research,
is processing the engine bed, the numerical control system, the cutting tool system,
CAD/ especially Correlation technology and so on CAM software develops
unceasingly under the impetus, high speed processes the technology more and more
many to apply in the mold cavity processing and the manufacture.
The numerical control high-speed cutting processing took in the mold
manufacture a most important advanced manufacture technology, is the collection is
highly effective, high quality, the low consumption in a body advanced manufacture
technology. Is opposite in the traditional machining, its cutting speed, entered to the
speed had the very big enhancement, moreover cut the mechanism not to be same.
The high-speed cutting caused the machining to have the leap, its specific power
metal excision rate enhanced 30%~40%, the cutting force reduced 30%, the cutting
tool working durability enhanced 70%, remained hotly large scale reduces in the work
piece cutting, the low step shudder vanished nearly. Along with the cutting speed
enhancement, unit time semifinished materials material removing rate increased, the
cutting time reduced, the processing efficiency enhanced, thus reduced the product
manufacture cycle, enhanced the product market competitive power. At the same time,
the high speed processing small amount entered quickly causes the cutting force to
reduce, the scrap high speed discharged reduced the work piece cutting force and the
thermal load distorts, enhances the rigidity to be bad and the thin wall components
machining possibility. Because cutting force reducing, the rotational speed
enhancement causes the cutting system the operating frequency to be far away the
engine bed the low step natural frequency, but the work piece surface roughness is
most sensitive to the low step frequency, from this reduced the surface roughness. In
mold high hard steel stock (HRC45~HRC65) in the processing process, uses the
high-speed cutting to be possible to substitute for the working procedure which the
electrical finishing and rubs truncates polishes, thus has avoided the electrode
manufacture and the time-consuming electrical finishing, large scale reduced fitter's
polishing with to throw the light quantity. Thin wall mold work piece more and more
needs which regarding some markets in, the high speed milling also may smoothly
complete, moreover in the high speed milling CNC processing center, a mold attire
clamps may complete the multiplex step of processing.
The high speed processing technology has had the huge influence to the mold
processing craft, changed the traditional mold processing to use "the annealing →
milling processing → heat treatment → to rub truncates" or "the electric spark
machining →manually polishes, polishes" and so on the complex long technical
process, even might use the high-speed cutting processing substitution original
complete working procedure. The high speed processing technology besides may
apply in the hard mold cavity direct processing (in particular half precision work and
precision work), in EDM aspect and so on electrode processing, fast type manufacture
also obtained the widespread application. The mass productions practice indicated
that, the application high-speed cutting technology may save in the mold following
processing 80% handwork to grind the time approximately, saves the processing cost
expense nearly 30%, the mold face work precision may reach 1 m, the cutting tool
cutting efficiency may enhance one time. Second, high speed milling processing engine bed The high-speed cutting technology is one of machining technology main
development directions, it along with foundation technology the and so on CNC
technology,..